MoparFins

December 13, 2017, 09:21:24 PM

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Put the insulation back in if you intend on using a low rise dual plane intake (like the stock unit or an Edelbrock performer), but if your going to use a high rise single plane manifold you won't need it.

I just read in a Mopar magazine that if you are going to modify the intake, or use a different carb, you should cut off/cover up the heat riser crossover on the intake. Since I do not have the insulation any more, and get heat soak after a long drive, I might just do that. But, are there "plates" available to cover these up? I have never looked.

Also, I've always tossed the insulation. By the time I've taken off a manifold that stuff is so bad - ripped or burnt - that I've not wanted to put it bacK on. Question: is that stuff available new?

So, what everone is saying is, the world as we know it will come to an apocolyptic end if I don't use insulation.

I'm not using the stuff. I do have a heat problem after a long drive. The fuel will evaporate from the carb, especially in the summer. But then, it can hit 115* here! I am going to check into capping off those intake heat-exchange passages. It doesn't get cold enogh here to need them in the winter.

I just read in a Mopar magazine that if you are going to modify the intake, or use a different carb, you should cut off/cover up the heat riser crossover on the intake. Since I do not have the insulation any more, and get heat soak after a long drive, I might just do that. But, are there "plates" available to cover these up? I have never looked.

Scott, just get a short piece of Corning fiberglass insulation, and make two pads out of it, 'cause it is the exact same stuff.

Moe, I don't want the stuff. It's an aesthetic thing, and I think that stuff looks lousy sticking out under the mainfold. I like a clean, empty valley pan.

I like the magazine's suggestion of capping off the cross-over at the heads. But, I can imagine a small plate there causing a mounting problem, so I wonder how they propose doing so. I don't have the heat riser anymore, so there's no forced exhaust going through my manifold, but exhaust gas will still pass through in normal conditions.